[Remote] Backend Software Engineer, Core App

About OnePay

OnePay is a consumer fintech company trusted by millions of Americans to improve their financial systems. From spending and saving to borrowing and building better financial habits, OnePay brings people's financial needs together in one place. It is a sub-organization of Walmart. It was founded in 2020, and is headquartered in New York, New York, USA, with a workforce of 501-1000 employees. Its website is https://www.onepay.com.

Job Description

This is a remote job, open to candidates in the USA.

The Backend Software Engineer will design, build, and ship backend services that enhance user experiences across mobile and web platforms while collaborating with various teams to improve system architecture and performance.

Responsibilities

• Design, build, and ship backend services that support user-facing features across mobile and web experiences
• Collaborate closely with frontend engineers, product managers, designers, and data partners
• Lead backend technical planning and contribute to architecture decisions that improve scalability, reliability, and performance
• Proactively identify opportunities to improve user experience through backend optimizations and system enhancements
• Build and maintain clear technical documentation to support a growing and distributed engineering organization

Skills

• 5+ years of professional experience building and scaling backend systems in consumer technology or fintech environments
• Experience designing and operating distributed systems, APIs, and data flows that support user facing applications
• Familiarity with message brokers and event driven systems, as well as caching and performance optimization strategies
• Demonstrated ability to lead technical execution, mentor other engineers, and deliver with a high bar for quality
• Drive and proactivity -- everyone here is a builder and executor
• Familiarity with functional programming concepts

Benefits

• Competitive base salary, stock options, and health benefits from Day 1
• 401(k) plan with company match
• Remote-friendly (US), flexible time off (FTO), and opportunities for growth